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BlueJ 5.2.0 released
20 Jun 2023

BlueJ 5.2.0 has now been released, you can download it from the main page.

More details about the release are available for members in this discussion thread.

BlueJ 5.1.0a released, fixes Mac crash
27 Oct 2022

BlueJ 5.1.0a is now available at This release fixes the crash on load on macOS 13 (Ventura)

Users of other operating systems are unaffected and can continue using 5.1.0 as before.

BlueJ now lives on Github
11 Oct 2022

BlueJ development has now moved to Github.

BlueJ has been open source for a long time, and using Git internally, but until now our repository has been private. Today that changes: BlueJ lives on Github and all future development will take place directly on Github. You can read more about this in this discussion post.

BlueJ 5.1.0 released
20 Sep 2022

BlueJ 5.1.0 is now available for download.

This release switches to Java 17 and adds support for all the language features in Java 17. More information is available in this discussion post.

BlueJ 5.0.3 released
28 Mar 2022

BlueJ 5.0.3 has now been released and is available for download.

More details on the release are available in a discussion post.

BlueJ 5.0.2a released
02 Dec 2021

Version 5.0.2a is an update for Mac only, to fix crashes that occur on MacOS 12 (Monterey).

All users on other operating systems should continue to use 5.0.2 as before, but Mac users are advised to update to 5.0.2a, especially if on MacOS Monterey.

BlueJ 5.0.2 released
06 Aug 2021

BlueJ 5.0.2 has now been released, containing fixes for a crash on launch, an issue with JavaFX user programs, and several editor bugs.

Full details are in this post.

BlueJ 5.0.1 released
30 Apr 2021

BlueJ 5.0.1 has now been released, containing many bug fixes and a few new features, such as automatically closing curly brackets, and allowing editing of text files.

Full details are in this post.

BlueJ 5.0.0 has been released
28 Jan 2021

BlueJ 5.0.0 has now been released, featuring an improved Java editor, JUnit 5 support and more. It is available to download now.

More details are available in this announcement post.

BlueJ 4.2.2 released
04 Oct 2019

BlueJ 4.2.2 has now been released. It fixes an issue with a space being inserted at the beginning of output to the terminal, and a bug where the Submitter preferences could not be edited.

It is available for download from the front page and more information on changes is on the versions page.

BlueJ 4.2.1 released
30 Apr 2019

BlueJ 4.2.1 is now available. This fixes several bugs, including startup freezes on Windows, JavaFX on Ubuntu, and issues with the “file changed on disk” dialog incorrectly appearing.

More discussion of this release can be found in this thread

BlueJ 4.2.0 released with Java 11 support
07 Feb 2019

BlueJ 4.2.0 is now available for download. This is the first release to move beyond Java 8. It targets Java 11, and features support for the var keyword added in Java 10.

For more information, especially about the 64-bit operating system requirement, see this thread.

Bug fix release - BlueJ 4.1.4
30 Oct 2018

BlueJ 4.1.4 fixes a memory leak that caused BlueJ to slow down after some time of editing files.

The error only appeared on some installations, but when it did it caused BlueJ to become inoperable after a time of working with it.

The error was caused by a memory leak in a library update of third party component we are using. It is now fixed.

We recommend that all users upgrade to this new version.

BlueJ 4.1.3 released
07 Sep 2018

BlueJ 4.1.3 has now been released and is available for download. This fixes various minor bugs, especially in the Git support. We recommend upgrading.

If you weren’t aware, BlueJ has had Git support since the release of version 4.0.0, as part of our support for Teamworking. You can use this approachable Git interface to develop BlueJ projects with GitHub, GitLab or any other Git provider.

BlueJ is 19 years old
23 Aug 2018

BlueJ 1.0.0 was released on 23rd August 1999, meaning that today is the 19th anniversary of that release. We are pleased that BlueJ has remained relevant and popular over that time period, with usage still steadily growing.

Thanks to all our new users, but especially to all our long-time users – we apologise if this makes you feel old! We are busily working on version 4.1.3, which we expect to be released in September.

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